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Ball locks ![]()
Ball lock DU-600 with hydraulic drive is designed for overlapping water flow access into hydro turbine and performs the functions:
remote lock opening and closing from control desk; alarm automatic lock closing at hydraulic unit passing to speed-up condition, at failure in operation of hydro turbine wicket gate or sudden failure of power to oil-head plant.
Mechanical ball lock ZSh-60-16
Lock ZSh-60-16 is designed for overlapping turbine drainage pipe-line on the side of downstream and performs functions of guard shut-off element.
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| Ball lock DU-600 with hydraulic drive | | Rated lock diameter, mm | 600 | | Max.static head, m | 170 | | Max. hydrodynamic head, m | 250 | | Water leakage through lock seals at the head of 170 m2, not more, s | 3,6 | | Lock opening time, not more, l/min | 30 | | Time of lock alarm closing with the use of load, not more, s | 6 | | Lock drive for opening | hydraulic | | Lock drive for closing | load | | Oil pressure in lock control system:, MPa | | | rated | 6.3 | | min | 4.5 | | Voltage in DC electric (control) circuits, V | 24 | | | | Mechanical ball lock ZSh-60-16 | | Rated lock diameter, mm | 600 | | Rated static head, m | 16 | | Max. static head, m | 20 | | Max. force on hand drive handwheel (at compression of one seal by 2 mm), kg | 11 | | Allowable leakage value, l/min. | 0,6 | | Lock (design) weight, kg | 708 |
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